Wow, it is getting difficult to keep up with all the records and milestones on the M157 5.5 liter (63 AMG bi-turbo) V8 as tuners compete for supremacy Renntech was able to set a new milestone by pushing the motor over 700 wheel horsepower on pump gas. There are other tuners in the 700's but they are currently all on race fuel 100+ octane. Renntech was able to do 725 wheel horsepower on a dynojet in STD correction on standard 93 octane pump fuel.

The S63 in the m5 stands no chance with stock turbos. This type of horsepower is insane with nothing but simple bolt ons. The M157 has to be one of the nicest engines around at the moment, if not the best in its own category. Unbelievable!

The S63 in the m5 stands no chance with stock turbos. This type of horsepower is insane with nothing but simple bolt ons. The M157 has to be one of the nicest engines around at the moment, if not the best in its own category. Unbelievable!

This is with upgraded turbos though on stock turbos the M5 has at least a decent shot but seems the M157 just has more room stock for stock at this point.

The S63 in the m5 stands no chance with stock turbos. This type of horsepower is insane with nothing but simple bolt ons. The M157 has to be one of the nicest engines around at the moment, if not the best in its own category. Unbelievable!

Indeed for the AMG M157. The BMW S63B44tu has great potential, just as the same to an Audi/Bentley 4.0TFSI Plus 520bhp/650Nm (rumors are that engine reaching 670bhp/800Nm on a tune =) BMW M just needs to let some of their more creative engineers to create a more spiced up S63tu & send them to the track.

For a street legal, full interior trim & emission legal E63 4matic. It's all in how much you want to spend; the Torque&Power to weight ratio & what things break/fix first. A 9's it's VERY possible. Unlike trying to make a powered street legal & emission legal M156 going 9's for years!

For a street legal, full interior trim & emission legal E63 4matic. It's all in how much you want to spend; the Torque&Power to weight ratio & what things break/fix first. A 9's it's VERY possible. Unlike trying to make a powered street legal & emission legal M156 going 9's for years!

Well it's certainly possible with the motor but we're not talking on 93 octane.

For a street legal, full interior trim & emission legal E63 4matic. It's all in how much you want to spend; the Torque&Power to weight ratio & what things break/fix first. A 9's it's VERY possible. Unlike trying to make a powered street legal & emission legal M156 going 9's for years!

I'm sure they can. But, have anyone done 9's with N2o yet with a AMG63?

Not a 9'second pass but basically 9 second pass .. Ecambell ran a 10.01 and has the mb/amg trap speed record at 144mph and that was all boost no nitrous i believe they are 100whp up from thentime they did that run so im sure well see a 9 sec run soon no nitrous from either him or Jrcart. Plus we saw at no fly zone what a basic non built trans stage 3 bs did to the turbo upgraded e63 im sure the big dog clk's would spank it for now will be interesting to see .. Hows the MCT trans behaving with all this ridiculous torque?? Was it necessary to build the trans? I dont believe weistec upgraded it on their e63

BMW is like 10 years behind in tech. The v12 biturbos from 2003 are better engines than these new 2012 4.4 overboosted pieces of crap in the M5's

That's not true whatsoever the S63TU is a much, much more advanced motor than the Benz V12's. They only make power due to the big torque from 12 cylinder and big displacement. They have junk manifolds with relatively small turbos. The heads suck, the valvetrain sucks, they aren't all that reliable, the cams sucks, they aren't technology advanced, etc.